CN117871060A - Pressure-resistant detection device and method for water meter shell - Google Patents

Abstract

The present invention provides a water meter case pressure resistance detection device and detection method, belonging to the field of water meter case detection technology, including a base, a clamping mechanism and a detection component; the present invention, through the arrangement of a first screw, a threaded sleeve, a sealing gasket and a pressure pump, realizes sealing of the inner cavity of the case to be tested and applies air pressure in the box, and then observes the changes in the readings of the barometer to judge whether the pressure resistance and air tightness of the case to be tested meet the use requirements, and in the above-mentioned detection process, by utilizing the cooperation between the push rod, the wedge-shaped push block, the jacking plate and the displacement monitor, the shear resistance of the side wall of the case to be tested can be detected at the same time, thereby improving the calibration effect of the device; and in the process of pressurization and pressure relief, by utilizing the cooperation between the second screw, the cleaning impeller, the magnetic suction block and the cleaning brush, the inner wall of the case to be tested can be comprehensively cleaned in a rotating and movable manner, thereby improving the cleanliness of the inside of the case to be tested.

Description

A water meter shell pressure detection device and detection method

Technical Field

The present invention relates to the field of water meter case detection, and in particular to a water meter case pressure resistance detection device and a detection method.

Background technique

A water meter is an instrument for measuring water flow, most of which measure the cumulative flow of water. It is generally divided into two categories: volumetric water meter and velocity water meter. The internal structure of a traditional water meter can be divided into three major parts from the outside to the inside: shell, sleeve, and inner core. The water meter shell is the component that directly contacts water, so it needs to be tested to see if it meets the usage standards before it is put into use.

The publication number is "CN112179640A". A water meter shell pressure resistance detection device includes a detection platform and a support base. The upper end surface of the detection platform is vertically fixed with support columns near the four corners. The upper end of the support column is horizontally fixed with a support top plate. The upper end of the support top plate is fixed with a hydraulic cylinder. The lower end of the hydraulic cylinder output end is fixed with a piston rod. The lower end of the piston rod is fixed with a stamped arc plate. Two groups of water meter fixing components are installed on the upper end of the detection platform, and a water meter body is installed between the two groups of water meter fixing components. In the present invention, the stamped arc plate is driven to move downward by the setting of the hydraulic cylinder to complete the pressure resistance test of the water meter body. The setting of the water meter fixing component can ensure that the water meter body always remains stable during the test process. The entire invention has a simple structure and is easy to operate. It can detect the pressure resistance of the water meter shell, and the test data is accurate, the test speed is fast, and the practicability is high.

The above device only shows a fixing device for the water meter case. The specific detection method is relatively simple and cannot perform multi-faceted detection on the water meter case, making the detection result unrepresentative. Moreover, as a component that directly contacts water, the inner wall of the water meter case should be kept sufficiently clean before use. However, the above device does not have this effect, which may cause certain metal contaminants to remain on the inner wall of the water meter case, ultimately causing damage to the water source or human body. Therefore, how to invent a water meter case pressure resistance detection device and detection method to improve these problems has become an urgent problem to be solved by those skilled in the art.

Summary of the invention

In order to remedy the above deficiencies, the present invention provides a water meter case pressure resistance detection device and detection method, aiming to improve the problem that the existing device detection method is relatively single, cannot perform multi-faceted detection on the water meter case, makes the detection results unrepresentative, and cannot clean the metal contaminants remaining on the inner wall of the water meter case during the detection process.

The present invention is achieved in that:

The present invention provides a water meter case pressure resistance detection device, comprising a base, a case to be tested, and a sliding groove opened in the middle of the base, a first lead screw is rotatably connected inside the sliding groove, and the threads on both sides of the first lead screw are in opposite directions, a drive motor is fixedly connected to the side wall of the base, and the output shaft of the drive motor is fixedly connected to the end of the first lead screw, and further comprising:

A clamping mechanism, which is arranged on the upper surface of the base and is used to position and clamp the watch case to be tested;

The detection component is installed on the base, and the detection component is used to perform pressure resistance, shear resistance and air tightness tests on the watch case to be tested.

Preferably, the clamping mechanism includes a positioning seat, which is fixedly connected to the upper surface of the base, the side wall of the positioning seat is hinged with a clamping sleeve, the side wall of the clamping sleeve is fixedly connected with a tie cable, the side wall of the positioning seat is threadedly connected with a positioning pin, the end of the tie cable close to the positioning pin is fixedly connected with a clamping ring, and the clamping ring is sleeved on the side wall of the positioning pin, the sides of the positioning seat and the clamping sleeve close to each other are fixedly connected with fastening pads, and the side walls at both ends of the case to be tested are in fit with the fastening pads.

Preferably, the positioning seat is symmetrically arranged along the center of the sliding groove, and the center of the positioning seat coincides with the center of the sliding groove.

Preferably, the detection component includes a threaded sleeve, two threaded sleeves are symmetrically arranged along the center of the sliding groove, each threaded sleeve is threadedly connected to the side wall of the first screw, the side wall of the threaded sleeve is fixedly connected to a limiting slide rod, and the limiting slide rod is slidingly connected to the sliding groove, the threaded sleeves on both sides are fixedly connected to a sealing gasket on one side close to the watch case to be tested, the side wall of the threaded sleeve close to the driving motor is fixedly connected to a pressure pump, and the output end of the pressure pump passes through the side wall of the threaded sleeve, and the side wall of the threaded sleeve away from the driving motor is fixedly connected to a pressure gauge, and the output end of the pressure gauge passes through the side wall of the threaded sleeve.

Preferably, the threaded sleeves on both sides are fixedly connected with a second screw at the middle part of one side close to the watch case to be tested, the sum of the lengths of the second screws on both sides is equal to the length of the watch case to be tested, and the ends of the second screws on both sides close to each other are threadedly connected after being fitted together, and the side wall of the second screw close to the side of the pressure pump is threadedly connected with a cleaning impeller, and a telescopic groove is provided in the inner cavity of the cleaning impeller, and a magnetic block is slidably connected in the telescopic groove, a first spring is fixedly connected between the magnetic block and the bottom of the telescopic groove, and a cleaning brush is fixedly connected to the side of the magnetic block away from the first spring, and the magnetic block is magnetically connected to the inner wall of the watch case to be tested.

Preferably, a pressure relief pipe is connected through the side wall of the threaded sleeve plate close to the pressure pump, and a pressure relief valve is provided on the side wall of the pressure relief pipe.

Preferably, the outer diameter of the cleaning impeller is smaller than the inner diameter of both sides of the watch case to be tested, and the second lead screw and the center of the watch case to be tested are on the same axis.

Preferably, lifting grooves are provided on both sides of the sliding groove below the watch case to be tested, a lifting plate is slidably connected to the inner wall of the lifting groove, a second spring is fixedly connected between the bottom of the lifting plate and the lifting groove, a push rod is fixedly connected to the side of the threaded sleeve plate close to the lifting plate, a wedge-shaped push block is fixedly connected to one end of the push rod close to the lifting plate, and the side of the lifting plate close to the wedge-shaped push block is wedge-shaped and matched with the wedge-shaped push block.

Preferably, a displacement monitor is fixedly connected to the inner wall of the sliding groove located below the middle of the case to be tested, two groups of lifting grooves are symmetrically arranged along the center of the sliding groove, and the distance from the wedge-shaped push block to the lifting plate is smaller than the distance from the threaded sleeve plate to the side wall of the case to be tested.

A method for testing the pressure resistance of a water meter shell, the steps are as follows:

S1. First, place the watch case to be tested between the positioning seat and the clamping sleeve, and align the longitudinal axis of the watch case to be tested with the longitudinal axis of the base, and then lock the watch case to be tested by the cooperation of the tie-knot steel cable, the positioning pin and the clamping ring;

S2, then start the driving motor, so that the threaded sleeves on both sides move toward each other along the first screw. During this process, the wedge-shaped push block will fit with the side wall of the lifting plate, and under the action of the horizontal thrust, the lifting plate will slide up and down to contact the bottom of the case to be tested and apply an upward shear force to it, and observe whether the reading of the displacement monitor changes, so as to detect the shear strength of the side wall of the case to be tested;

S3. After the wedge-shaped push block passes over the jacking plate, the sealing gasket of the side wall of the threaded sleeve plate will fit with the two ends of the case to be tested. At this time, the reading C1 of the pressure gauge is recorded, and then the pressure pump is turned on to input a quantitative air pressure C2 into the case to be tested. Then observe whether the final reading of the pressure gauge is equal to C1+C2, and observe whether the reading of the displacement monitor changes, so as to realize the pressure resistance and air tightness detection of the inner wall of the case to be tested;

S4. When the pressure pump is introduced to fill the air flow into the watch case to be tested, the cleaning impeller is driven to rotate, so that the cleaning impeller is rotated on the inner wall of the watch case to be tested, and the magnetic relationship between the magnetic block and the inner wall of the watch case to be tested is utilized to extend the cleaning brush to clean the inner wall of the watch case to be tested;

S5. After the test is completed, the air pressure inside the case to be tested is discharged from the pressure relief pipe through the pressure relief valve. At this time, the reverse airflow will also drive the cleaning impeller to move in the reverse rotation, so that the cleaning impeller is reset and the inner wall of the case to be tested is reciprocated to clean, thereby improving the cleanliness of the inside of the case to be tested.

The beneficial effects of the present invention are as follows: the present invention seals the inner cavity of the watch case to be tested and applies air pressure in the box through the arrangement of the first screw, the threaded sleeve, the sealing gasket and the pressure pump, and then judges whether the pressure resistance and air tightness of the watch case to be tested meet the use requirements by observing the changes in the readings of the barometer, and in the above-mentioned detection process, the shear resistance of the side wall of the watch case to be tested can be detected simultaneously by utilizing the cooperation between the push rod, the wedge-shaped push block, the lifting plate and the displacement monitor, so as to realize the detection of the watch case to be tested from multiple aspects, thereby improving the detection effect of the device; and in the process of pressurization and pressure relief, the inner wall of the watch case to be tested can be comprehensively cleaned in a rotational and movable manner through the cooperation between the second screw, the cleaning impeller, the magnetic suction block and the cleaning brush, thereby improving the cleanliness of the inside of the watch case to be tested.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of the overall structure of a water meter case pressure resistance detection device provided by an embodiment of the present invention;

FIG2 is a schematic diagram of the overall structure of a water meter case pressure resistance detection device provided by an embodiment of the present invention from a top view;

3 is a schematic diagram of a partial cross-sectional structure of a water meter case pressure resistance detection device provided by an embodiment of the present invention;

4 is a schematic diagram of the internal structure of a sliding groove of a water meter case pressure resistance detection device provided in an embodiment of the present invention;

5 is a schematic diagram of the internal structure of a jacking tank of a water meter case pressure resistance detection device provided in an embodiment of the present invention;

6 is a partial half-section structural schematic diagram of a water meter case pressure resistance detection device provided in an embodiment of the present invention;

7 is a schematic diagram of the internal structure of a cleaning impeller of a water meter case pressure resistance detection device provided in an embodiment of the present invention;

FIG8 is a schematic diagram of the structure of a clamping mechanism of a water meter case pressure resistance detection device provided in an embodiment of the present invention.

In the figure, 1, base; 101, sliding groove; 102, first lead screw; 103, driving motor; 2, case to be tested; 3, clamping mechanism; 311, limit slide rod; 312, pressure relief pipe; 313, pressure relief valve; 31, positioning seat; 32, snap sleeve; 33, tie rope; 34, positioning pin; 35, snap ring; 36, fastening pad; 4, detection component; 41, threaded sleeve; 42, sealing gasket; 43, pressure pump; 44, barometer; 45, second lead screw; 46, cleaning impeller; 47, telescopic groove; 48, magnetic block; 481, first spring; 482, cleaning brush; 5, lifting groove; 51, lifting plate; 52, second spring; 53, push rod; 54, wedge-shaped push block; 55, displacement monitor.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

Example

1-8, a water meter case pressure resistance detection device includes a base 1, a test case 2 and a sliding groove 101 opened in the middle of the base 1, a first screw 102 is rotatably connected inside the sliding groove 101, and the threads on both sides of the first screw 102 are in opposite directions, a drive motor 103 is fixedly connected to the side wall of the base 1, and the output shaft of the drive motor 103 is fixedly connected to the end of the first screw 102, and also includes:

A clamping mechanism 3, which is arranged on the upper surface of the base 1 and is used to position and clamp the watch case 2 to be tested;

The detection component 4 is installed on the base 1, and the detection component 4 is used to perform pressure resistance, shear resistance and air tightness tests on the watch case 2 to be tested.

Referring to Figures 1, 2 and 8, further, the clamping mechanism 3 includes a positioning seat 31, the positioning seat 31 is fixedly connected to the upper surface of the base 1, the side wall of the positioning seat 31 is hinged with a clamping sleeve 32, the side wall of the clamping sleeve 32 is fixedly connected with a tie cable 33, the side wall of the positioning seat 31 is threadedly connected with a positioning pin 34, the end of the tie cable 33 close to the positioning pin 34 is fixedly connected with a clamping ring 35, and the clamping ring 35 is sleeved on the side wall of the positioning pin 34, the side of the positioning seat 31 and the clamping sleeve 32 close to each other are fixedly connected with a fastening pad 36, and the side walls of the two ends of the watch case 2 to be tested are fitted with the fastening pad 36;

1 and 2 , further, the positioning seat 31 is symmetrically arranged along the center of the sliding groove 101 , and the center of the positioning seat 31 coincides with the center of the sliding groove 101 ;

It should be noted that: through the arrangement of the above structure, the case 2 to be tested can be quickly positioned and clamped, thereby improving the detection efficiency of the device, and the use of the tie-knot steel cable 33 for positioning and fixing can provide a stable clamping and limiting effect for the case 2 to be tested, and prevent the case 2 to be tested from deviating during the subsequent detection process, so that the subsequent shear resistance detection is more accurate, thereby improving the practicality of the device;

Referring to Figures 3, 4 and 5, further, the detection component 4 includes a threaded sleeve 41, two threaded sleeves 41 are symmetrically arranged along the center of the sliding groove 101, each threaded sleeve 41 is threadedly connected to the side wall of the first screw 102, the side wall of the threaded sleeve 41 is fixedly connected to the limiting slide bar 311, and the limiting slide bar 311 is slidably connected to the sliding groove 101, and the side of the threaded sleeves 41 on both sides close to the watch case 2 to be tested is fixedly connected with a sealing gasket 42, the side wall of the threaded sleeve 41 close to the driving motor 103 is fixedly connected to a pressure pump 43, and the output end of the pressure pump 43 passes through the side wall of the threaded sleeve 41, and the side wall of the threaded sleeve 41 away from the driving motor 103 is fixedly connected to a barometer 44, and the output end of the barometer 44 passes through the side wall of the threaded sleeve 41;

It should be noted that: through the arrangement of the above structure, after the threaded sleeve 41 is fitted with the side wall of the watch case 2 to be tested, the first screws 102 on both sides will also be aligned and fitted, so that the two first screws 102 are connected to form a whole that can simultaneously satisfy the cleaning impeller 46 to perform rotational movement, so as to facilitate comprehensive cleaning of the inner wall of the watch case 2 to be tested, thereby improving the cleaning effect of the device;

Referring to Figures 3, 4 and 5, further, the threaded sleeve plates 41 on both sides are fixedly connected to the middle part of one side close to the watch case 2 to be tested, the sum of the lengths of the second screws 45 on both sides is equal to the length of the watch case 2 to be tested, and the ends of the second screws 45 on both sides close to each other are threadedly connected after being fitted, and the side wall of the second screw 45 close to the side of the pressure pump 43 is threadedly connected to a cleaning impeller 46, and the inner cavity of the cleaning impeller 46 is provided with a telescopic groove 47, and a magnetic suction block 48 is slidably connected in the telescopic groove 47, and a first spring 481 is fixedly connected between the magnetic suction block 48 and the bottom of the telescopic groove 47, and a cleaning brush 482 is fixedly connected to one side of the magnetic suction block 48 away from the first spring 481, and the magnetic suction block 48 is magnetically connected to the inner wall of the watch case 2 to be tested;

It should be noted that: through the setting of the above-mentioned structure, the pressure pump 43 is used to fill the air flow into the sealed watch case 2 to increase its internal pressure, so as to detect the pressure resistance performance of the watch case 2 to be tested. When the air flow is filled, the cleaning impeller 46 will also be blown to rotate and move on the second screw 45. The magnetic relationship between the magnetic block 48 and the inner wall of the watch case 2 to be tested is utilized to make the cleaning brush 482 extend, so that the inner wall of the watch case 2 to be tested is comprehensively cleaned along with the rotational movement of the cleaning impeller 46, thereby improving the cleanliness of the watch case 2 to be tested.

3, 4 and 5, further, a pressure relief pipe 312 is connected through the side wall of the threaded sleeve plate 41 close to the pressure pump 43, and a pressure relief valve 313 is provided on the side wall of the pressure relief pipe 312;

It should be noted that: through the setting of the above-mentioned structure, the internal air pressure of the watch case 2 to be tested is discharged from the pressure relief pipe 312 through the pressure relief valve 313, and the reverse airflow at this time will drive the cleaning impeller 46 to move in the reverse rotation, so that the cleaning impeller 46 is reset and the inner wall of the watch case 2 to be tested is reciprocated to clean, thereby improving the cleanliness of the interior of the watch case 2 to be tested.

1, 2 and 3, further, the outer diameter of the cleaning impeller 46 is smaller than the inner diameter of both sides of the case 2 to be tested, and the second screw 45 and the center of the case 2 to be tested are on the same axis;

Among them, the first screw 102 and the second screw 45 are both existing mature reciprocating screws, so the reciprocating principle thereof will not be described in detail;

It should be noted that: through the arrangement of the above-mentioned structure, it can be ensured that the distance between the side wall of the cleaning impeller 46 and the inner wall of any position of the case 2 to be tested is the same, so that it can be cleaned evenly, thereby improving the cleaning effect of the device.

Referring to Figures 3, 4 and 5, further, lifting grooves 5 are provided on both sides of the sliding groove 101 below the watch case 2 to be tested, and a lifting plate 51 is slidably connected to the inner wall of the lifting groove 5, and a second spring 52 is fixedly connected between the bottom of the lifting plate 51 and the lifting groove 5, and a push rod 53 is fixedly connected to one side of the threaded sleeve 41 close to the lifting plate 51, and a wedge-shaped push block 54 is fixedly connected to one end of the push rod 53 close to the lifting plate 51, and a side of the lifting plate 51 close to the wedge-shaped push block 54 is wedge-shaped and adapted to the wedge-shaped push block 54;

3 and 4, further, a displacement monitor 55 is fixedly connected to the inner wall of the sliding groove 101 located below the middle of the watch case 2 to be tested, and two groups of jacking grooves 5 are symmetrically arranged along the center of the sliding groove 101, and the distance from the wedge-shaped push block 54 to the jacking plate 51 is less than the distance from the threaded sleeve plate 41 to the side wall of the watch case 2 to be tested;

It should be noted that: through the setting of the above-mentioned structure, in the process of the threaded sleeves 41 on both sides moving toward each other along the first screw 102, the wedge-shaped push block 54 will come into contact and slide with the lifting plate 51, so that the lifting plate 51 will be lifted upward, thereby applying an upward shear force to the bottom of the watch case 2 to be tested, and then cooperating with the setting of the displacement monitor 55 (the model of the displacement monitor 55 is AR-SS-LSWY05, which is the prior art and will not be described in detail), so that in the process of pressure resistance and airtightness testing, the shear resistance of the side wall of the watch case 2 to be tested is detected, thereby improving the calibration efficiency of the device.

Referring to Figure 1-8, a method for testing the water meter casing pressure resistance is shown in the following steps:

S1, firstly place the watch case 2 to be tested between the positioning seat 31 and the clamping sleeve 32, and align the longitudinal axis of the watch case 2 to be tested with the longitudinal axis of the base 1, and then lock the watch case 2 to be tested by the cooperation of the tie rope 33, the positioning pin 34 and the clamping ring 35, so as to complete the clamping and positioning of the watch case 2 to be tested;

S2, the driving motor 103 is immediately turned on, so that the threaded sleeves 41 on both sides move toward each other along the first screw 102. During this process, the wedge-shaped push block 54 will fit with the side wall of the lifting plate 51, and under the action of the horizontal thrust, the lifting plate 51 will slide up and down to contact the bottom of the watch case 2 to be tested and apply an upward shear force to it. At this time, observe whether the reading of the displacement monitor 55 changes, so as to determine whether the watch case 2 to be tested will bend and deform under the appropriate extrusion effect;

S3, after the wedge-shaped push block 54 passes over the jacking plate 51, the sealing gasket 42 of the side wall of the threaded sleeve plate 41 will fit with the two ends of the watch case 2 to be tested. At this time, the reading C1 of the barometer 44 is recorded, and then the pressure pump 43 is turned on to input a quantitative air pressure C2 into the watch case 2 to be tested, and then observe whether the final reading of the barometer 44 is equal to C1+C2. If the final reading of the barometer 44 is less than C1+C2, it means that the air tightness and pressure resistance of the watch case 2 to be tested cannot meet the requirements. At this time, it is necessary to observe whether the reading of the displacement monitor 55 changes, so as to determine whether it is caused by insufficient air tightness or outward expansion and deformation of the watch case 2 to be tested, so as to complete the pressure resistance and air tightness detection of the inner wall of the watch case 2 to be tested;

S4, when the pressure pump 43 is introduced to fill the watch case 2 to be tested with air, the blowing action of the air will drive the cleaning impeller 46 to rotate and move on the second lead screw 45, so that the cleaning impeller 46 is rotated on the inner wall of the watch case 2 to be tested, and the magnetic relationship between the magnetic block 48 and the inner wall of the watch case 2 to be tested is used to make the cleaning brush 482 extend to the inner wall of the watch case 2 to be tested to clean;

S5. After the test is completed, the internal air pressure of the watch case 2 to be tested is discharged from the pressure relief pipe 312 through the pressure relief valve 313. At this time, the reverse airflow will also drive the cleaning impeller 46 to move in the reverse rotation, so that the cleaning impeller 46 is reset and reciprocatingly cleans the inner wall of the watch case 2 to be tested.

It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a withstand voltage detection device of water gauge shell, includes base (1), watchcase (2) and sets up sliding groove (101) at base (1) middle part, its characterized in that, sliding groove (101) inside rotates and is connected with first lead screw (102), just first lead screw (102) both sides screw opposite direction, base (1) lateral wall fixedly connected with driving motor (103), just driving motor (103) output shaft and first lead screw (102) tip fixed connection still include:

the clamping mechanism (3), the clamping mechanism (3) is arranged on the upper surface of the base (1), and the clamping mechanism (3) is used for positioning and clamping the watchcase (2) to be tested;

the detection assembly (4), the detection assembly (4) is installed on the base (1), and the detection assembly (4) is used for carrying out pressure-resistant, shearing-resistant and airtight detection on the watchcase (2) to be detected.

2. The pressure-resistant detection device for the water meter shell according to claim 1, wherein the clamping mechanism (3) comprises a positioning seat (31), the positioning seat (31) is fixedly connected with the upper surface of the base (1), a clamping sleeve (32) is hinged to the side wall of the positioning seat (31), a drawknot steel cable (33) is fixedly connected to the side wall of the clamping sleeve (32), a positioning pin (34) is connected to the side wall of the positioning seat (31) in a threaded manner, a clamping ring (35) is fixedly connected to one end, close to the positioning pin (34), of the drawknot steel cable (33), the clamping ring (35) is sleeved on the side wall of the positioning pin (34), a fastening pad (36) is fixedly connected to one side, close to each other, of the positioning seat (31) and the clamping sleeve (32), and two end side walls of the to-be-detected watchcase (2) are attached to the fastening pad (36).

3. A pressure-resistant detection device for a water meter shell according to claim 2, wherein the positioning seat (31) is symmetrically arranged along the center of the sliding groove (101), and the center of the positioning seat (31) coincides with the center of the sliding groove (101).

4. The pressure-resistant detection device for the water meter shell according to claim 1, wherein the detection assembly (4) comprises threaded sleeve plates (41), the threaded sleeve plates (41) are symmetrically arranged along the centers of the sliding grooves (101) to be two, each threaded sleeve plate (41) is in threaded connection with the side wall of the first screw rod (102), the side wall of the threaded sleeve plate (41) is fixedly connected with a limit sliding rod (311), the limit sliding rod (311) is in sliding connection with the sliding groove (101), sealing gaskets (42) are fixedly connected to one side, close to the to-be-detected watchcase (2), of the threaded sleeve plate (41), a pressurizing pump (43) is fixedly connected to the side wall of the threaded sleeve plate (41) close to the driving motor (103), the output end of the pressurizing pump (43) penetrates through the side wall of the threaded sleeve plate (41), the side wall of the threaded sleeve plate (41) far away from the driving motor (103) is fixedly connected with an air pressure gauge (44), and the output end of the air pressure gauge (44) penetrates through the side wall of the threaded sleeve plate (41).

5. The pressure-resistant water meter shell detection device according to claim 4, wherein the threaded sleeve plates (41) on two sides are fixedly connected with a second lead screw (45) in the middle of one side, close to the meter shell (2) to be detected, of the two sides, the sum of the lengths of the second lead screws (45) is equal to the length of the meter shell (2) to be detected, one ends, close to each other, of the second lead screws (45) on two sides are in threaded connection after being attached, the side wall of the second lead screw (45) close to one side of the pressurizing pump (43) is in threaded connection with a cleaning impeller (46), an inner cavity of the cleaning impeller (46) is provided with a telescopic groove (47), a magnetic suction block (48) is connected in sliding mode between the telescopic groove (47), a first spring (481) is fixedly connected between the magnetic suction block (48) and the bottom of the telescopic groove (47), one side, far from the first spring (481), of the magnetic suction block (48) is fixedly connected with a cleaning brush (482), and the magnetic suction block (48) is magnetically connected with the inner wall of the meter shell (2) to be detected.

6. The pressure-resistant detection device for a water meter housing according to claim 5, wherein a pressure discharge pipe (312) is connected to a side wall of the screw sleeve plate (41) on a side close to the pressurizing pump (43) in a penetrating manner, and a pressure discharge valve (313) is provided on a side wall of the pressure discharge pipe (312).

7. The pressure-resistant detection device for the water meter shell according to claim 5, wherein the outer diameter of the cleaning impeller (46) is smaller than the inner diameters of two sides of the to-be-detected meter shell (2), and the second lead screw (45) and the center of the to-be-detected meter shell (2) are located on the same axis.

8. The pressure-resistant water meter shell detection device according to claim 4, wherein lifting grooves (5) are formed in two sides of the sliding groove (101) below the meter shell (2) to be detected, lifting plates (51) are slidably connected to the inner walls of the lifting grooves (5), second springs (52) are fixedly connected between the bottoms of the lifting plates (51) and the lifting grooves (5), push rods (53) are fixedly connected to one sides, close to the lifting plates (51), of the threaded sleeve plates (41), wedge-shaped push blocks (54) are fixedly connected to one ends, close to the lifting plates (51), of the push rods (53), and one sides, close to the wedge-shaped push blocks (54), of the lifting plates (51) are arranged in a wedge-shaped mode and are matched with the wedge-shaped push blocks (54).

9. The pressure-resistant detection device for the water meter shell according to claim 8, wherein displacement monitors (55) are fixedly connected to the inner wall of the sliding groove (101) below the middle part of the to-be-detected meter shell (2), two groups of jacking grooves (5) are symmetrically arranged along the center of the sliding groove (101), and the distance from the wedge-shaped pushing block (54) to the jacking plate (51) is smaller than the distance from the thread sleeve plate (41) to the side wall of the to-be-detected meter shell (2).

10. A method for detecting the pressure resistance of a water meter housing according to any one of claims 1 to 9, comprising the steps of:

s1, firstly, placing a watchcase (2) to be tested between a positioning seat (31) and a clamping sleeve (32), enabling the longitudinal axis of the watchcase (2) to be tested to be aligned with the longitudinal axis of a base (1), and then locking the watchcase (2) to be tested through the cooperation of a drawknot steel cable (33), a positioning pin (34) and a clamping ring (35);

s2, immediately starting a driving motor (103) to enable thread sleeve plates (41) at two sides to move along a first screw rod (102) in opposite directions, in the process, enabling a wedge-shaped push block (54) to be attached to the side wall of a jacking plate (51), enabling the jacking plate (51) to slide up and down under the action of horizontal thrust to be in contact with the bottom of a watchcase (2) to be tested and exerting upward shearing force on the jacking plate, observing whether readings of a displacement monitor (55) change or not, and detecting the shear strength of the side wall of the watchcase (2) to be tested;

s3, after the wedge-shaped push block (54) passes over the jacking plate (51), the sealing gasket (42) on the side wall of the threaded sleeve plate (41) is attached to two ends of the watchcase (2) to be tested, at the moment, the reading C1 of the barometer (44) is recorded, then the pressurizing pump (43) is started to input quantitative air pressure C2 into the watchcase (2) to be tested, then whether the final reading of the barometer (44) is equal to C1+C2 is observed, and whether the reading of the displacement monitor (55) is changed is observed, so that the pressure resistance and the air tightness of the inner wall of the watchcase (2) to be tested are detected;

s4, when the pressurizing pump (43) is introduced to charge air flow into the watchcase (2) to be tested, the cleaning impeller (46) is pushed to rotate, so that the cleaning impeller (46) moves rotationally on the inner wall of the watchcase (2) to be tested, and the cleaning brush (482) stretches out to clean the inner wall of the watchcase (2) to be tested by utilizing the magnetic relation between the magnetic attraction block (48) and the inner wall of the watchcase (2) to be tested;

s5, after detection is completed, the air pressure in the watchcase (2) to be detected is discharged from the pressure discharge pipe (312) through the pressure discharge valve (313), and the air flow flowing reversely at the moment drives the cleaning impeller (46) to move reversely, so that the cleaning impeller (46) is reset and the inner wall of the watchcase (2) to be detected is cleaned in a reciprocating mode, and the internal cleanliness of the watchcase (2) to be detected is improved.